Clarification.
A JDM-ish programmer by definition takes the voltage for VPP directly from the com port. If you use an external supply or a charge pump as you suggest below it is not JDM. It is only the JDM-ish programers I have problems with
people suggesting.
There are many ways tp build a programmer. In my opinion and this is a
opinion: If a person intends to develop their own code it makes much more
sense to build a programer like an ICD2 or PICkit clone which have ICD.
If you have a part number for that 5 pin DC-DC converter I would like it.
3v0